Re: [rt-users] RT creates CLOSE_WAITS

[Matt Zagrabelny]

On Wed, Oct 28, 2015 at 3:07 AM, Asanka Gunasekera
 wrote:
> Hi all I have been struggling with this CLOSE_WAITS.
>
> I have an Request Tracker installed on CEntOS 6.7 (64 bit) RT rt-4.2.12 and 
> Apache httpd-2.2.31. I can log in and all, but after a while I am seeing 
> CLOSE_WAIT socket are created for each selection that I make on the 
> dashboard. Eventually the system goes unresponsive.

What does the console (VC1) say?

Are you running systemd? What about the journal?

-m

[rt-users] RT creates CLOSE_WAITS

[Asanka Gunasekera]

Hi all I have been struggling with this CLOSE_WAITS.

I have an Request Tracker installed on CEntOS 6.7 (64 bit) RT rt-4.2.12 and 
Apache httpd-2.2.31. I can log in and all, but after a while I am seeing 
CLOSE_WAIT socket are created for each selection that I make on the dashboard. 
Eventually the system goes unresponsive.

root@iplrt logs]# netstat -nalp | grep -i wait
tcp 1 0 192.168.11.254:80 192.168.11.118:57076 CLOSE_WAIT 3176/httpd 
tcp 1 0 192.168.11.254:80 192.168.11.118:57083 CLOSE_WAIT 3177/httpd 
tcp 1 0 192.168.11.254:80 192.168.11.118:57082 CLOSE_WAIT 3185/httpd 
tcp 1 0 192.168.11.254:80 192.168.11.118:57084 CLOSE_WAIT 3365/httpd 
[root@iplrt logs]# 

I don't see any errors in the logs! I have downgraded both RT and Apache with 
no luck and I am STUCK no ware to goo

Can some one tell me how to go about diagnosing this 

Thanks and Regards

Re: [rt-users] RT creates CLOSE_WAITS

[Bill Cole]

On 28 Oct 2015, at 4:07, Asanka Gunasekera wrote:


Hi all I have been struggling with this CLOSE_WAITS.

I have an Request Tracker installed on CEntOS 6.7 (64 bit) RT 
rt-4.2.12 and Apache httpd-2.2.31. I can log in and all, but after a 
while I am seeing CLOSE_WAIT socket are created for each selection 
that I make on the dashboard. Eventually the system goes unresponsive.


root@iplrt logs]# netstat -nalp | grep -i wait
tcp 1 0 192.168.11.254:80 192.168.11.118:57076 CLOSE_WAIT 3176/httpd
tcp 1 0 192.168.11.254:80 192.168.11.118:57083 CLOSE_WAIT 3177/httpd
tcp 1 0 192.168.11.254:80 192.168.11.118:57082 CLOSE_WAIT 3185/httpd
tcp 1 0 192.168.11.254:80 192.168.11.118:57084 CLOSE_WAIT 3365/httpd
[root@iplrt logs]#

I don't see any errors in the logs! I have downgraded both RT and 
Apache with no luck and I am STUCK no ware to goo


Can some one tell me how to go about diagnosing this


What interface are you using to run RT via Apache? (Possible answers: 
mod_fastcgi, mod_fcgid, mod_perl 1.x, mod_perl 2.x)


That is important because a CLOSE_WAIT state indicates that the OS is 
waiting on a local process (in this case multiple Apache httpd 
processes) to recognize that the socket has been closed on the other end 
and call close() itself. The Apache core doesn't have that problem much, 
so the issue is most likely lurking in whatever module is loaded into 
the httpd process to handle running RT proper.


(my bet is that you're running a slightly broken mod_perl, but I'm 
biased by bad experiences...)